CVE-2025-21669
Published: February 1, 2025Last modified: February 1, 2025
Description
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.127-r0) |
| Stream | linux-lts | Fixed (6.6.74-r0) |
References
- https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040
- https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1
- https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d
- https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61
- https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee
- https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de